10.5061/DRYAD.98SF7M0JN
Traylor, Taryn
0000-0001-8195-3599
University of Nevada, Las Vegas
Burnley, Pamela
University of Nevada, Las Vegas
Whitaker, Matthew
Stony Brook University
Supplemental dataset from: Initial acoustoelastic measurements in olivine:
Investigating the effect of stress on P- and S-wave velocities
Dryad
dataset
2021
FOS: Earth and related environmental sciences
National Science Foundation
https://ror.org/021nxhr62
NSF-EAR13613399
National Nuclear Security Administration
https://ror.org/03sk1we31
DE-NA0001982
2022-02-24T00:00:00Z
2022-02-24T00:00:00Z
en
106367 bytes
4
CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
It is well known that elasticity is a key physical property in the
determination of the structure and composition of the Earth and provides
critical information for the interpretation of seismic data. This study
investigates the stress-induced variation in elastic wave velocities,
known as the acoustoelastic effect, in San Carlos olivine. A recently
developed experimental ultrasonic acoustic system, the Directly Integrated
Acoustic System Combined with Pressure Experiments (DIASCoPE), was used
with the D-DIA multi-anvil apparatus to transmit ultrasonic sound waves
and collect the reflections. We use the DIASCoPE to obtain longitudinal
(P) and shear (S) elastic wave velocities from the sample which we compare
to our known stress state in the D-DIA derived from synchrotron X-ray
diffraction. We use elastic-plastic self-consistent (EPSC) numerical
modeling to forward model X-ray diffraction data collected in D-DIA
experiments to obtain the macroscopic stress on our sample. We can observe
the relationship between the relative elastic wave velocity change (ΔV/V)
and macroscopic stress to determine the acoustoelastic constants, and
interpret our observations using the linearized first-order equation based
on the model proposed by Hughes and Kelly (1953). This work supports the
presence of the acoustoelastic effect in San Carlos olivine, which can be
measured as a function of pressure and temperature. This study will aid in
our understanding of the acoustoelastic effect and provide a new
experimental technique to measure the stress state in elastically deformed
geologic materials at high pressure conditions.
The ultrasonics-modified deformation-DIA experiments were conducted using
the D-DIA multi-anvil apparatus (Durham et al., 2002) and DIASCoPE
acoustic system (Whitaker et al., 2017) located at the 6-BM-B beamline at
the Advanced Photon Source at Argonne National Laboratory, Chicago,
Illinois. The D-DIA multi-anvil apparatus combined with a synchrotron
beamline provides the ability to measure sample stress and strain using
in-situ X-ray techniques during the deformation experiment. The
incorporation of the DIASCoPE acoustic system into a traditional D-DIA
experiment allowed for simultaneous travel time measurements when
deforming. Using the sample length measurements from synchrotron
X-radiographic imaging and P- and S-wave travel times from the DIASCoPE,
the elastic P- and S-wave velocities were determined. We peak fit
diffraction data from the compressional (ψ= 0°, 180°) and transverse
detectors (ψ= 90°) using Plot85. The olivine diffraction peaks measured to
obtain d-spacing values were (130), (131), (112), (122), (140), and (211).
Powder diffraction data collected from the sample during deformation was
then interpreted through elastic-plastic self-consistent (EPSC) modeling
(Tomé & Oliver, 2002) following the strategies devised by Burnley
(2015) and Burnley and Kaboli (2019) to determine the macroscopic stress
on the sample.